ALTA 1.4125 / 440C steel is a high Carbon-Chromium martensitic stainless steel. It has moderate corrosion resistance and good strength, high hardness and wear resistance after quenching, good dimensional stability in high or low temperature.
Applications
²Suitable for manufacturing bearings in corrosive media such as sea water, river water, nitric acid, steam and marine
²Suitable for tableware (knives) with good corrosion resistance (magnetic)
²Blades, nozzles, valves, rulers
Chemical composition
Chemical Composition per %
C
Si
Mn
P
S
Cr
Mo
Ni
Cu
Min.
0.95
16.0
0.40
Max.
1.20
1.00
1.00
0.040
0.030
18.0
0.80
0.25
0.25
Basic melting process :
IM/EAF + LF + VD + (ESR)
Hardness :
Max 269 HB (annealed)
Reduction ratio :
5 : 1 minimum or required
Grain size :
≥ 5.0 per ASTM E112
Non-metallic inclusion :
≤ 1.0 (thick), ≤ 1.5 (thin) per ASTM E45 method A (more pure by ESR route)
